html,table,body,div,ul,li{
    margin:0px;
    padding:0px;
}
body{
    font-size: 12px;
}
.qb{
    margin: 0 auto;
    width: 1003px;
}
ul,li{
    list-style:none;}
.f_left{
    float:left;
}
.f_right{
    float:right;
}
.f_clear{
    clear:both;
}
